Laser driver for IR diode

i have this IR diodes the rated at 2W 9mm 830nm
so what driver would i use on this diode since the + and negative are turned since most drivers i have are negative tail it would cause a spark i believe diode bin + and the host bin - any tips !! or any links to a driver :thinking:

Alien Laser said:

i have this IR diodes the rated at 2W 9mm 830nm
so what driver would i use on this diode since the + and negative are turned since most drivers i have are negative tail it would cause a spark i believe diode bin + and the host bin - any tips !! or any links to a driver :thinking:

Click to expand...

Maybe this one? Professional high power 2W 808nm laser diode constant current driver TTL 9V | eBay

Encap, I bought a bunch of diode drivers which look just like that, but for blue laser diodes. Either this one will adjust down to the required current at the voltage needed for IR diodes, or the version is different, don't know, can't compare with mine as they are in Alaska while I am on the other side of the planet.

That driver doesn't specify its voltage and current adjustment ranges for output, but what voltage is required? Most iR diodes are close to 2 V or less. Before someone remarks it's the current we adjust, not the voltage.... if the driver won't adjust to a low enough voltage, it won't work for you either. Hows that for jumping the gun... Thing is, for some diodes, if for example, they require x current at 4.0 VDC to forward bias a laser diode to full rated output, but that same driver won't adjust down to a required 2.0 VDC at any current level, you can't use it. If the seller has listed the driver for 808nm, I guess it will adjust down, or they wouldn't list it that way. That said, all of the drivers I bought which use that design worked well for me.

found the data 2.1A typ 2.5A Max Operation voltage 1.9V max 2.2
/ but i would use the 1.3A 2V because am not sure 100% if it is the 2W or the 1W version,
wow Alaskan you are really good at this your like the data sheet

I have a lot of interest in IR diodes, have a bunch of them myself. That way when I point into the sky no one can take me to jail for flashing an aircraft!

alaskan any idea what driver i could use so i can install it in a host !

Probably any driver made for 2W red 638-660 nm will work, contact Jordan through DTR LPF Googleshop. Although on second thought, not many red laser diodes that powerful, maybe the driver used for the G84 will work, if I remember that diode number correctly? He prob has drivers which will adjust down to 1.9-2.2 VDC at 2+ amps without any problem.

Looks like that diode will take 2.5 amps according to the data sheet. It will be very important that whatever driver you get, t must be a continuous positive side and regulate the negative side, especially if you are putting it in a handheld.

paul1598419 agree this is why i have some trouble finding a driver i was thinking about the nano driver !
the diodes are 2W am going to set it up as the 1W diode will be awesome

Yeah, there are plenty of drivers for 1 watt diodes. They aren't expensive either. I think the last time I looked they were about $8.00 each. Seems a shame to settle for 1 watt when this diode can do 2.5 watts. At least it would seem so from the data sheet.

( paul1598419 ) nice am looking at some drivers on ebay if i can find something !

My guess is any of these drivers will work for you:

https://sites.google.com/site/dtrlpf/home/flexdrives/x-drive

Get the one on the left set for 2.4 amps - you can get cheaper drivers, but I don't think you can get better cheaper drivers.

Alaskan said:

My guess is any of these drivers will work for you:

https://sites.google.com/site/dtrlpf/home/flexdrives/x-drive

Get the one on the left set for 2.4 amps - you can get cheaper drivers, but I don't think you can get better cheaper drivers.

Click to expand...

The only problem I see with these are I think they use a continuous ground and regulate the positive side. These diodes are case positive and in a handheld, or pointer, it would short out the battery. You would have to completely isolate the diode from the host.

I'm so confused, is his diode common positive or negative to the case? I thought those drivers were for case positive and regulated the negative lead.

lets ask DTR since i have no idea this is what i was thinking it may shorten the battery ?
i was thinking to get the Nano Buck/Boost Drivers and set it at 1.1A / or a X-Drive set to 1.2A for long diodes life

Appears, I didn't clue into what you were working with. I'm used to IR diodes which have the negative side regulated with a common positive case.